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| author | Johan Hovold <johan@hovoldconsulting.com> | 2015-05-19 09:22:46 (GMT) |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@google.com> | 2015-05-21 05:52:03 (GMT) |
| commit | d52b35f6b62c8b9e1b7e10010daa0370f8252f1d (patch) | |
| tree | 48c07e6a9c3fb195b2d6dbdc92a18883e2dcb8f7 /drivers | |
| parent | 8e929a8230794c4b034d0f4b658aa03702f3800d (diff) | |
| download | linux-d52b35f6b62c8b9e1b7e10010daa0370f8252f1d.tar.xz | |
greybus: operation: add helper to retrieve max payload size
Add helper to retrieve the maximum payload size for operations on a
specific connection.
Note that the helper is not inlined due to how the header files are
currently organised, but it is not expected to be called after a
connection has been initialised either.
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/staging/greybus/operation.c | 8 | ||||
| -rw-r--r-- | drivers/staging/greybus/operation.h | 1 |
2 files changed, 9 insertions, 0 deletions
diff --git a/drivers/staging/greybus/operation.c b/drivers/staging/greybus/operation.c index c78ccc0..f595b97 100644 --- a/drivers/staging/greybus/operation.c +++ b/drivers/staging/greybus/operation.c @@ -504,6 +504,14 @@ struct gb_operation *gb_operation_create(struct gb_connection *connection, } EXPORT_SYMBOL_GPL(gb_operation_create); +size_t gb_operation_get_payload_size_max(struct gb_connection *connection) +{ + struct greybus_host_device *hd = connection->hd; + + return hd->buffer_size_max - sizeof(struct gb_operation_msg_hdr); +} +EXPORT_SYMBOL_GPL(gb_operation_get_payload_size_max); + static struct gb_operation * gb_operation_create_incoming(struct gb_connection *connection, u16 id, u8 type, void *data, size_t size) diff --git a/drivers/staging/greybus/operation.h b/drivers/staging/greybus/operation.h index 740aacc..0199976 100644 --- a/drivers/staging/greybus/operation.h +++ b/drivers/staging/greybus/operation.h @@ -130,6 +130,7 @@ void gb_connection_recv(struct gb_connection *connection, int gb_operation_result(struct gb_operation *operation); +size_t gb_operation_get_payload_size_max(struct gb_connection *connection); struct gb_operation *gb_operation_create(struct gb_connection *connection, u8 type, size_t request_size, size_t response_size); |